In the new issue of Prestige magazine, the "Blurred Lines" singer and 37-year-old actress, who've been making lots of headlines recently, are gushing about being there for each other, especially during tough moments in their professional lives.
"I don't know if I would still be alive in some ways if it wasn't for Paula," Thicke tells the mag. "She's been my rock, my muse, my inspiration and I love her. The whole way."
"I've been there for his down moments and he's been there for mine," Patton added. "Life is full of peaks and valleys. Robin has always been a great person to remind me to celebrate now. Even when it looks like I've got a role but don't know for sure, he's like, 'Let's celebrate!'"
Thick says welcoming their 3-year-old son, Julian, changed his life "in every single way."
"My son is my good-luck charm; he's made me not think about myself all day long," he dished. "All of a sudden he shows up with his beautiful smile and perfect energy and makes me go, 'Ah, forget my little problems.' He's an amazing child."
As for how the gorgeous couples spends time alone together? Patton said, "Talking to each other. We watch movies. Just sit and contemplate—we have a house with a bit of a view. Listening to music. Talking about what's going on in our lives. We're best friends."